Inflatable cube



FIG. 1 is a perspective view of an inflatable cube showing my new design;

FIG. 2 is a front view thereof.

FIG. 3 is a rear view thereof.

FIG. 4 is a right side view thereof.

FIG. 5 is a left side view thereof.

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The portions of the design shown in broken lines being for illustrative purposes only and forming no part of the claimed design. 

CLAIM The ornamental design for an inflatable cube, as shown and described. 